class_docstr: Reader for the Comparative Sentence Dataset by Jindal and Liu (2006).
  
      >>> from nltk.corpus import comparative_sentences
      >>> comparison = comparative_sentences.comparisons()[0]
      >>> comparison.text # doctest: +NORMALIZE_WHITESPACE
      ['its', 'fast-forward', 'and', 'rewind', 'work', 'much', 'more', 'smoothly',
      'and', 'consistently', 'than', 'those', 'of', 'other', 'models', 'i', "'ve",
      'had', '.']
      >>> comparison.entity_2
      'models'
      >>> (comparison.feature, comparison.keyword)
      ('rewind', 'more')
      >>> len(comparative_sentences.comparisons())
      853
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docstr: Return all words and punctuation symbols in the corpus.
  
  :param fileids: a list or regexp specifying the ids of the files whose
      words have to be returned.
  :return: the given file(s) as a list of words and punctuation symbols.
  :rtype: list(str)
docstr_tok: ["Return","all","words","and","punctuation","symbols","in","the","corpus",".",":","param","fileids",":","a","list","or","regexp","specifying","the","ids","of","the","files","whose","words","have","to","be","returned",".",":","return",":","the","given","file","(","s",")","as","a","list","of","words","and","punctuation","symbols",".",":","rtype",":","list","(","str",")"]
code: def words(self, fileids=None):
      """
      Return all words and punctuation symbols in the corpus.
  
      :param fileids: a list or regexp specifying the ids of the files whose
          words have to be returned.
      :return: the given file(s) as a list of words and punctuation symbols.
      :rtype: list(str)
      """
      return concat(
          [
              self.CorpusView(path, self._read_word_block, encoding=enc)
              for (path, enc, fileid) in self.abspaths(
                  fileids, True, True
              )
          ]
      )
  
file_path: nltk/nltk/corpus/reader/comparative_sents.py
imports: import re
  from nltk.corpus.reader.api import *
  from nltk.tokenize import *
label_desc: Use image node_id 6 for calling the ComparativeSentencesCorpusReader obj's underlying member method code with example usage: obj.words(fileids) and returns: concat